720 Area Code

Area code 720 is a central Colorado area code that covers Denver, Boulder and their surrounding areas. Area code 720 overlays the area code of 303.

Colorado has area codes of 303, 719, 720, 970.

Counties that Use 720 Area Code

All Cities & Towns that Use 720 Area Code

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Where is 720 area code?

The following map shows the coverage of 720 area code. The coverage area is shown in green.

Area code map of the entire U.S.